That version was a pre-alfa version of kvm support in qemu, is insanely
outdated, is heavily patched by redhat. I don't even think USB2 was
supported by that version. Please try on a current version of qemu and
kernel and reopen if the problem persist there.
** Changed in: qemu
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1458121
Title:
USB2 is five times slower than native on qemu-kvm
Status in QEMU:
Invalid
Bug description:
Dear Qemu,
Spice told me to report this over here.
Scientific Linux 6.6
$ uname -r
2.6.32-504.16.2.el6.x86_64
$ cat /etc/redhat-release
Scientific Linux release 6.6 (Carbon)
$ rpm -qa qemu\*
qemu-img-0.12.1.2-2.448.el6_6.3.x86_64
qemu-kvm-0.12.1.2-2.448.el6_6.3.x86_64
I have a bootable USB2 FC21 flash drive. I can boot my machine directly from
it or run it as a virtual machine through KVM.
Problem: it is about 5 times slower through KVM. (Really, I am not
exaggerating)
Many thanks,
-T
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